---
upgrade:
  - |
    The ``OpenAPIConnector``, ``OpenAPIServiceConnector`` and ``OpenAPIServiceToFunctions`` components have
    been removed from Haystack and moved into the dedicated ``openapi-haystack`` integration package.

    Install the package and update your imports:

    Before:

    .. code:: python

      from haystack.components.connectors import OpenAPIConnector, OpenAPIServiceConnector
      from haystack.components.converters import OpenAPIServiceToFunctions

    After:

    .. code:: python

      from haystack_integrations.components.connectors.openapi import OpenAPIConnector, OpenAPIServiceConnector
      from haystack_integrations.components.converters.openapi import OpenAPIServiceToFunctions

    These components are a legacy way to connect Haystack to external APIs. For most use cases, consider
    using the ``MCPTool`` instead, which is the modern, standardized way to give pipelines and agents
    access to external tools and services.